<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <el-steps class="mt-15" :active="active-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          class="mt-15"
          v-model="active"
          :before-leave="beforeLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--  -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableDate" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTableDate" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                <el-button type="primary" @click="addGoods" class="mt-15">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>


    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
        <img :src="previewUrl" class="previewImg"/>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      catelist: [],
      active: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        pics:[],
        goods_introduce:'',
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      manyTableDate: [],
      onlyTableDate: [],
      uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的header请求头
      headerObj:{
          Authorization:sessionStorage.getItem('token')
      },
      previewUrl:'',
      previewVisible:false
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$axios.get('categories')
      if (res.meta.status !== 200)
        return this.$message({
          message: '获取商品分类数据失败！',
          type: 'error'
        })
      this.catelist = res.data
      this.$message({
        message: res.meta.msg,
        type: 'success'
      })
    },
    // 级联选择
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //
    beforeLeave(activeName, oldName) {
      if (this.addForm.goods_cat.length !== 3) {
        this.$message({
          message: '请先选择商品分类',
          type: 'info'
        })
        return false
      }
    },
    //
    async tabClicked() {
      //   console.log(this.active)
      if (this.active == '1') {
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200)
          return this.$message({
            message: '获取参数失败',
            type: 'error'
          })
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = res.data
        console.log(res.data)
      } else if (this.active == '2') {
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200)
          return this.$message({
            message: '获取参数失败',
            type: 'error'
          })
        this.onlyTableDate = res.data
        console.log(res.data)
      }
    },
    // 图片预览
    handlePreview(file){
        console.log(file)
        this.previewUrl = file.response.data.url;
        this.previewVisible = true;
    },
    // 移出图片
    handleRemove(file){
        const filePath = file.response.data.tmp_path;
        const i = this.addForm.pics.findIndex(x=>x.pic==filePath)
        this.addForm.pics.splice(i,1);
    },
    handleSuccess(res){
        // 
        const picInfo = {pic:res.data.tmp_path}
        this.addForm.pics.push(picInfo)
    },
    addGoods(){
        this.$refs.addFormRef.validate(async valid=>{
            if(!valid) return this.$message({
                message: '请填写必要的表单项',
                type: 'error'
            });
            // 这里会产生一个问题，提交的时候要的是字符串，但是v-model绑定
            //的时候要的是数组，这样就矛盾了, 解决办法：深拷贝一份这个对象（lodash）
            //this.addForm.goods_cat = this.addForm.goods_cat.join(',');
            const form =  _.cloneDeep(this.addForm)
            form.goods_cat = this.addForm.goods_cat.join(',');
            // 处理动态参数
            this.manyTableDate.forEach(item=>{
                const newInfo = {
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)
            })
            // 静态属性处理
            this.onlyTableDate.forEach(item=>{
                const newInfo = {
                    attr_value:item.attr_vals
                }
                this.addForm.attrs.push(newInfo)
            })

            form.attrs = this.addForm.attrs;
             console.log('form----',form)
            const {data:res} = await this.$axios.post('goods',form)
            console.log('res---',res);
            if(res.meta.status!==201){
                return this.$message.error('添加商品失败')
            }
            this.$message({
                message: res.meta.msg,
                type: 'success'
            });
            this.$router.push('/goods');
        })
    }
  }
}
</script>

<style lang="less" scoped>
.previewImg{
    width:100%;
}
</style>